go to windows defender settings and add exclusions to:
- file gamingservices.exe
- file gamingservicesNet.exe
- file flightsimulator.exe
- process flightsimulator.exe
- process gamingservices.exe
- process gamingservicesnet.exe
- “root launcher folder” and “official” folder
https://support.microsoft.com/en-us/windows/add-an-exclusion-to-windows-security-811816c0-4dfd-af4a-47e4-c301afe13b26
Source https://forums.flightsimulator.com/t/unable-to-launch-msfs/423385/15